From 588a6a99286ae30afb1339d8bc2163517b1b7dd1 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Wed, 25 Jun 2014 10:08:50 -0700 Subject: [PATCH] leds: netxbig: fix attribute-creation race Use the attribute groups of the led-class to create the sata attribute during probe in order to avoid racing with userspace. [cooloney@gmail.com: clean up return led_classdev_register()] Signed-off-by: Johan Hovold Signed-off-by: Bryan Wu --- drivers/leds/leds-netxbig.c | 31 +++++++++++++------------------ 1 file changed, 13 insertions(+), 18 deletions(-) diff --git a/drivers/leds/leds-netxbig.c b/drivers/leds/leds-netxbig.c index e97f443a6e07..64fde485dcaa 100644 --- a/drivers/leds/leds-netxbig.c +++ b/drivers/leds/leds-netxbig.c @@ -293,10 +293,14 @@ static ssize_t netxbig_led_sata_show(struct device *dev, static DEVICE_ATTR(sata, 0644, netxbig_led_sata_show, netxbig_led_sata_store); +static struct attribute *netxbig_led_attrs[] = { + &dev_attr_sata.attr, + NULL +}; +ATTRIBUTE_GROUPS(netxbig_led); + static void delete_netxbig_led(struct netxbig_led_data *led_dat) { - if (led_dat->mode_val[NETXBIG_LED_SATA] != NETXBIG_LED_INVALID_MODE) - device_remove_file(led_dat->cdev.dev, &dev_attr_sata); led_classdev_unregister(&led_dat->cdev); } @@ -306,7 +310,6 @@ create_netxbig_led(struct platform_device *pdev, const struct netxbig_led *template) { struct netxbig_led_platform_data *pdata = dev_get_platdata(&pdev->dev); - int ret; spin_lock_init(&led_dat->lock); led_dat->gpio_ext = pdata->gpio_ext; @@ -327,6 +330,12 @@ create_netxbig_led(struct platform_device *pdev, led_dat->sata = 0; led_dat->cdev.brightness = LED_OFF; led_dat->cdev.flags |= LED_CORE_SUSPENDRESUME; + /* + * If available, expose the SATA activity blink capability through + * a "sata" sysfs attribute. + */ + if (led_dat->mode_val[NETXBIG_LED_SATA] != NETXBIG_LED_INVALID_MODE) + led_dat->cdev.groups = netxbig_led_groups; led_dat->mode_addr = template->mode_addr; led_dat->mode_val = template->mode_val; led_dat->bright_addr = template->bright_addr; @@ -334,21 +343,7 @@ create_netxbig_led(struct platform_device *pdev, led_dat->timer = pdata->timer; led_dat->num_timer = pdata->num_timer; - ret = led_classdev_register(&pdev->dev, &led_dat->cdev); - if (ret < 0) - return ret; - - /* - * If available, expose the SATA activity blink capability through - * a "sata" sysfs attribute. - */ - if (led_dat->mode_val[NETXBIG_LED_SATA] != NETXBIG_LED_INVALID_MODE) { - ret = device_create_file(led_dat->cdev.dev, &dev_attr_sata); - if (ret) - led_classdev_unregister(&led_dat->cdev); - } - - return ret; + return led_classdev_register(&pdev->dev, &led_dat->cdev); } static int netxbig_led_probe(struct platform_device *pdev) -- 2.20.1